Version 2.3.1 replaces spaces with non-breaking spaces when you format selected text with the 'monospace' button. This is useful when posting ABC or code. It's what the PRE tag does, but without the leading spaces that PRE generates here. Example:

P:A
|:D|"G"~G3 GAB|"D"ABA ABd|"G"edd gdd|"G"edB "D"dBA|
    "G"~G3 GAB|"D"ABA ABd|"G"edd gdB|"D"AGF "G"G2:|

You can use monospace formatting and box-drawing characters, in combination with the option to convert non-ASCII characters to html '&-codes' to display guitar tabs. This example is from a post by Stanron:

  E╓───╥─────────────┬─────────────┬─────────────┬─────────────╖R
  B╟───╫─────3───────┼─1───────────┼─────────────┼─────────────╢E
  G╟───╫─0─────4h2p0─┼─────2─────2─┼─4p2─0───────┼───────0─────╢P
  D╟─0─╫─────────────┼───────4h5───┼─0─────2h4─2─┼─0h2─4─────0─╢E
  A╟───╫───────2─────┼─3─────0─────┼───────3─────┼─────────────╢A
  E╙───╨─3───────────┴─────────────┴─────────────┴─2─────3─────╜T
  
   . + . 1 + + 2 + + . 1 + + 2 + + . 1 + + 2 + + . 1 + + 2 + +  

If you don't convert non-ASCII characters to &-codes it previews OK but converts the box-drawing characters to hyphens and pluses. You have to select this option - it's not on by default. The 'recover text' button reverses the conversion so you can edit what you originally typed or copied in.

Note, however, there is a bug in some versions of Android whereby not all box-drawing characters are the same width, so verticals do not always line up. I don't know whether other operating systems suffer from this.

(2 YEARS OF POSTS AFTER THIS REMOVED)